diff --git a/api-inmemory/package.json b/api-inmemory/package.json
index 718ef0bf..1c5f91b7 100644
--- a/api-inmemory/package.json
+++ b/api-inmemory/package.json
@@ -15,7 +15,7 @@
   "devDependencies": {
     "azure-functions-core-tools": "4.0.5095",
     "@types/node": "^18.x",
-    "typescript": "^4.0.0"
+    "typescript": "^5.9.3"
   },
   "main": "dist/src/functions/*.js"
 }